Multi-lamellar liquid crystal emulsion system
OwnerMichel Mercier, Paul Thau +1inventors
InventorsMichel Mercier, Paul Thau, John Chase
Life of this patent
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Abstract
Topical cosmetic and pharmaceutical oil-in-water emulsions wherein an emulsifier blend, comprising a mixture of at least two sucrose esters in combination with at least one solid fatty alcohol, forms a multi-lamellar liquid crystalline network that effectively moisturizes and protects the skin, and provides a useful vehicle for delivery of active ingredients. Sucrose esters are used in emulsions of the present invention at very low concentrations (from about 0.2% to about 1.2% by combined weight of sucrose esters relative to the total weight of the emulsion).
Claims39
A cosmetic or dermatological emulsifier system that forms a multi-lamellar liquid crystalline network comprising (i) a mixture of at least one first sucrose ester and at least one second sucrose ester and (ii) at least one solid fatty alcohol, said solid fatty alcohol having a melting point of at least about 45° C.
A cosmetic or dermatological emulsifier system that forms a multi-lamellar liquid crystalline network comprising:
- (a) a mixture of (i) a first sucrose ester being sucrose monostearate and (ii) a second sucrose ester being sucrose distearate;
- and
- (b) at least one solid fatty alcohol, said solid fatty alcohol having a melting point of at least about 45° C.
A cosmetic or dermatological composition having a multi-lamellar liquid crystalline network in an oil-in-water emulsion comprising
- (a) a mixture of sucrose monoester to sucrose diester in a monoester to diester ratio of from about 1:0.75 to about 1:1.33, where the combined sucrose esters are present from about 0.2% to about 1.2% by weight relative to the total weight of the emulsion;
- and
- (b) at least one solid fatty alcohol selected from the group consisting of cetyl alcohol, stearyl alcohol, behenyl alcohol, and mixtures thereof, where said solid fatty alcohol(s) is present at from about 0.7% to about 3.2% by weight relative to the total weight of the emulsion;
- and
- (c) optionally beta sitosterol present at from about 0.05% to about 0.5% by weight relative to the total weight of the emulsion.
A cosmetic or dermatological composition having a multi-lamellar liquid crystalline network in an oil-in-water emulsion comprising n inner oil phase;
- (a) an outer water phase;
- and
- (b) an emulsifier blend, wherein said blend comprises a mixture of at least two sucrose esters, said mixture present from about 0.2% to about 1.2% relative to the total weight of the emulsion;
- and
- (c) at least one solid fatty alcohol, said solid fatty alcohol having a melting point of at least about 45° C.;
- and, optionally;
- (d) a phytosterol,
- wherein said blend is hydrated in the water phase prior to adding the oil-phase to the water phase.
Dependencies are inferred from the claim text.